Line cleaners formulated for draft beer won't find and remove the tannins or potassium tartrate found in wine. WLC is a special blend of chemicals and surfactants that target and remove wine molds, yeast, tannins, residues, and tartrate deposits. Use regularly to keep the bouquet, clarity, color, and taste true in kegs of wine. Also great for cleaning vats, bottles and small parts used in making wine and mead. For a color rinse indicator, use with our allKlear tablets.